1、Designation: B837 01 (Reapproved 2009)Standard Specification forSeamless Copper Tube for Natural Gas and LiquifiedPetroleum (LP) Gas Fuel Distribution Systems1This standard is issued under the fixed designation B837; the number immediately following the designation indicates the year oforiginal adop
2、tion or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification establishes the requirements for TypeGAS seamless Cop
3、per UNS No. C12200 tube for use in aboveground natural gas and liquified petroleum (LP) gas fueldistribution systems, commonly assembled with flared fittingsor brazed joints.1.2 O60 (soft annealed) temper gas tube is produced in therange of standard sizes38 to78 in. outside diameter; H58(drawn gener
4、al purpose) temper gas tube is produced in therange of standard sizes38 to118 in. outside diameter.1.3 O60 (soft annealed) temper gas tube systems are nor-mally assembled with single 45 flared fittings, althoughbrazed connections using wrought or cast fittings may bepermitted by local or code requir
5、ements. H58 (drawn generalpurpose) temper gas tube systems are assembled with brazedconnections.NOTE 1Tube temper and applicable size are determined by installa-tion code requirements.1.4 Flared fittings used with seamless copper tube fornatural gas and liquified petroleum (LP) gas fuel distribution
6、systems shall be free of residual stresses.1.5 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:
7、2B153 Test Method for Expansion (Pin Test) of Copper andCopper-Alloy Pipe and TubingB601 Classification for Temper Designations for Copperand Copper AlloysWrought and CastB846 Terminology for Copper and Copper AlloysE3 Guide for Preparation of Metallographic SpecimensE8 Test Methods for Tension Test
8、ing of Metallic MaterialsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE53 Test Method for Determination of Copper in UnalloyedCopper by GravimetryE62 Test Methods for Chemical Analysis o
9、f Copper andCopper Alloys (Photometric Methods)E112 Test Methods for Determining Average Grain SizeE243 Practice for Electromagnetic (Eddy-Current) Exami-nation of Copper and Copper-Alloy TubesE255 Practice for Sampling Copper and Copper Alloys forthe Determination of Chemical Composition3. Terminol
10、ogy3.1 For general definitions of terms relating to copper andcopper alloys, refer to Terminology B846.3.2 Definitions:3.2.1 coil, na length of tube formed into a series ofconnected turns. The unqualified term “coil” as applied to tubeusually refers to a bunch coil.3.2.1.1 coil, bunched, na coil in
11、which turns are bunchedand held together such that a cross section of the bunched turnsis approximately circular.3.2.1.2 coil, double-layer flat, na coil in which the prod-uct is spirally wound into two connected disk-like layers suchthat one layer is on top of the other (a double-layer pancakecoil
12、or a double-layer spirally wound coil).3.2.1.3 coil, level or traverse wound, na coil in which theturns are wound into layers parallel to the axis of the coil suchthat successive turns in a given layer are adjoining one another(sometimes called a helical coil).1This specification is under the jurisd
13、iction ofASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.04 on Pipeand Tube.Current edition approved Oct. 1, 2009. Published January 2010. Originallyapproved in 1993. Last previous edition approved in 2001 as B837 01. DOI:10.1520/B0837-01R09.2For re
14、ferenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, W
15、est Conshohocken, PA 19428-2959, United States.3.2.1.4 coil, single-layer flat, na coil in which the productis spirally wound into a single disk-like layer (a pancake coil ora single-layer spirally wound coil).3.2.2 liquified petroleum (LP) gas, nany of the followinghydrocarbons or mixtures of them:
16、 propane, propylene, butane(normal butane or isobutane) and butylene.3.2.3 tube, gas, ntube specifically intended for use inabove ground and natural gas and liquified petroleum gas fueldistribution systems and conforming to the particular dimen-sions known as Type GAS.3.3 Definitions of Terms Specif
17、ic to This Standard:3.3.1 “capable of”, adjas used in this specification thetest need not be performed by the producer of the material toconfirm capability. However, should subsequent testing by thepurchaser establish that the material did not conform to therequirements of this specification, the ma
18、terial shall be subjectto rejection.4. Ordering Information4.1 Include the following information in orders for product.4.1.1 Type GAS tube (Table 1),4.1.2 Standard size (Table 1),4.1.3 Temper (Sections 5 and 7),4.1.4 Whether tension tests, Rockwell Hardness tests, andgrain size determinations are re
19、quired (Section 8),4.1.5 Whether an expansion test is required (Section 9),4.1.6 Length (11.5Table 2),4.1.7 Whether the tube is to be furnished in straight lengthsor coils,4.1.8 Quantity: number of straight lengths or coils required,4.1.9 Certification, if required (Section 20), and4.1.10 Mill test
20、report, if required (Section 21).4.2 In addition, when material is purchased for agencies ofthe U.S. government, it shall conform to the SupplementaryRequirements as defined herein, when specified in the contractor purchase order.5. Materials and Manufacture5.1 The material shall be of such quality
21、and purity that thefinished tube shall have the properties and characteristicsprescribed in this specification and shall be cold drawn to size.5.2 The tube shall be finished by such cold-working andannealing operations as are necessary to produce the requiredtemper and surface finish.5.3 Tubes furni
22、shed in coils shall be annealed after coiling.5.4 Tubes in straight lengths shall be furnished in the H58(Drawn General Purpose) temper, except when the O60 (SoftAnneal) temper is specified in the purchase order or contract.6. Chemical Composition6.1 The material shall conform to the following chemi
23、calrequirements of Copper UNS No. C12200:Copper (incl. silver) 99.9 % min.Phosphorus 0.015 to 0.040 %6.2 These composition limits do not preclude the presenceof other elements. Limits for unnamed elements may beestablished by agreement between the manufacturer or supplierand the purchaser.7. Temper7
24、.1 Type GAS copper tube shall be furnished in either of thefollowing tempers as defined in Classification B601.Soft anneal O60Drawn general purpose H588. Mechanical Property Requirements8.1 The tube shall conform to the mechanical propertyrequirements specified in Table 3. Tension tests and grain si
25、zedetermination need not be made except when requested by thepurchaser in the ordering document. Where agreement onRockwell Hardness tests cannot be reached, the tensile strengthand grain size requirements of Table 3 shall be the basis foracceptance or rejection.9. Expansion Test9.1 The soft anneal
26、(O60) temper tube shall be capable ofbeing expanded in accordance with Test Method B153 withexpansion of the outside diameter in the following amount:TABLE 1 Dimensions, Mass and Tolerances in Diameter and Wall Thickness for Standard Sizes of Type GAS Seamless Copper Tubefor Natural Gas and Propane
27、Fuel Distribution Systems (All Tolerances in This Table Are Plus and Minus)StandardSize, in.Actual OutsideDiameterAverage Outside DiameterATolerances Wall Thickness and Tolerance Theoretical Massin. (mm) Annealed Drawn Wall Thickness ToleranceBlbs/ft (kg/m)in. (mm) in. (mm) in. (mm) in. (mm)38 0.375
28、 (9.52) 0.002 (0.051) 0.001 (0.025) 0.030 (0.762) 0.003 (0.076) 0.126 (0.187)12 0.500 (12.7) 0.0025 (0.064) 0.001 (0.025) 0.035 (0.889) 0.004 (0.10) 0.198 (0.146)58 0.625 (15.9) 0.0025 (0.064) 0.001 (0.025) 0.040 (1.02) 0.004 (0.10) 0.285 (0.424)34 0.750 (19.1) 0.0025 (0.064) 0.001 (0.025) 0.042 (1.
29、07) 0.004 (0.10) 0.362 (0.539)78 0.875 (22.3) 0.003 (0.076) 0.001 (0.025) 0.045 (1.14) 0.004 (0.10) 0.455 (0.677)118 1.125 (29) . . 0.0015 (0.038) 0.050 (1.27) 0.005 (0.13) 0.655 (0.975)AThe average outside diameter of a tube is the average of the maximum and minimum outside diameter, as determined
30、at any one cross section of the tube.BMaximum permissible deviation at any one point.TABLE 2 Standard LengthsAand TolerancesStandard Size,in.Standard Length Tolerance, all plusft. (m) in. (mm)Tubes Furnished in Straight Lengths38 118 1220(3.7)(6.1)11(25)(25)Tubes Furnished in Coils38 78 60100(18)(30
31、.5)2424(600)(600)ALonger lengths are subject to agreement between the manufacturer or supplierand purchaser.B837 01 (2009)2Standard Size Expansion of(Actual Outside Diameter) Outside Diameterin. (mm) %0.625 (15.9) and under 40Over 0.625 (15.9) 30The expanded tube shall show no cracking or rupture vi
32、sibleto the unaided eye.10. Nondestructive Testing10.1 Each tube up to and including 1.125-in. (28.6-mm)outside diameter shall be subjected to an eddy-current test.Testing shall follow the procedures of Practice E243, exceptfor the determination of “end effect”. Tubes shall be passedthrough an eddy-
33、current test unit adjusted to provide informa-tion on the suitability of the tube for the intended application.10.1.1 Either notch depth or drilled hole standards shall beused.10.1.1.1 Notch depth standards, rounded to the nearest0.001 in. (0.025 mm), shall be 22 % of the standard wallthickness. The
34、 notch depth tolerance shall be plus and minus0.0005 in. (0.013 mm). Alternatively, at the option of themanufacturer, using speed insensitive eddy-current units thatare equipped so that a fraction of the maximum unbalancesignal can be selected, the following percent maximum unbal-ance signals may be
35、 used:Standard Size, in. (mm)Unbalanced SignalMagnitude, max. %Up to 0.500 (12.7) incl. 0.20.625 (15.9) to 1.125 (29) incl. 0.310.1.1.2 Drilled holes shall be drilled radially through thewall using a suitable drill jig that has a bushing to guide thedrill, care being taken to avoid distortion of the
36、 tube whiledrilling. The diameter of the drilled hole shall be in accordancewith the following Table and shall not vary by either morethan +0.001 in. ( +0.026 mm) or 0.000 in. (0.000 mm) of thehole diameter specified.Tube OutsideDiameter, in.Diameter of DrilledHoles, in. Drill No.38 to34 , incl 0.02
37、5 72Over34 to 1, incl 0.031 68Over 1 to 118 , incl 0.036 64Tube OutsideDiameter, mmDiameter of DrilledHoles, mm Drill No.9.0 to 19.0, incl 0.64 72Over 19.0 to 25, incl 0.79 68Over 25 to 29, incl 0.92 6410.1.2 Tubes that do not actuate the signalling device of theeddy-current tester shall be consider
38、ed in conformance with therequirements of this test. Tubes with discontinuities indicatedby the testing unit, may, at the option of the manufacturer, bere-examined or retested to determine whether the discontinuityis cause for rejection. Signals that are found to have beencaused by minor mechanical
39、damage shall not be cause forrejection of the tubes, provided the tube dimensions are stillwithin the specified limits and the tube is suitable for itsintended application.11. Dimensions, Mass, and Permissible Variations11.1 For the purpose of determining conformance with thedimensional requirements
40、 prescribed in this specification, anymeasured value outside the specified limiting values for anydimension may be cause for rejection.11.2 Standard Dimensions, Wall Thickness, and DiameterTolerancesThe standard dimensions, wall thickness, anddiameter tolerances shall be in accordance with Table 1.1
41、1.3 MassFor purposes of calculating mass, cross sec-tions, etc., the density of copper will be 0.323 lbs/in.3(8.94g/cm3). The theoretical mass per foot is given in Table 1.11.4 RoundnessFor drawn tube in straight lengths, theroundness tolerance shall be as specified in Table 4. Thedeviation from rou
42、ndness is measured as the difference be-tween major and minor diameters as determined at any onecross section of the tube. No roundness tolerance has beenestablished for annealed tube in straight lengths or for tubefurnished in coils.11.5 Standard Lengths and TolerancesThe standardlengths and tolera
43、nces shall be as specified in Table 2.11.6 Squareness of CutFor tubes in straight lengths, thedeparture from squareness of the end of any tube shall notexceed 0.010 in. (0.25 mm) for tube up to and including0.625-in. (15.9-mm) standard size; and not more than 0.016in./in. (0.016 mm/mm) of outside di
44、ameter for tube larger than0.625-in. (15.9-mm) standard size.12. Workmanship, Finish, and Appearance12.1 The tubes shall be clean and free from scale, adherentdirt, and defects of a nature that interfere with the intendedpurpose of the tubes.TABLE 3 Mechanical Property RequirementsTemper Designation
45、 Tensile Strength AverageGrainSize, mmRockwell HardnessAStandard Formerksi,Bmin.MPamin.ScaleHardnessValueO60 Softanneal30 (205) 0.035min.F 50 maxH58 Drawngeneralpurpose36 (250) . 30T 30 minARockwell Hardness tests shall be made on the inside surface of the tube.Bksi = 1000 psi.TABLE 4 Roundness Tole
46、rancet/d (Ratio of Wall Thicknessto Outside Diameter)Roundness Tolerance% of OutsideDiameter (Expressed to Nearest0.001 in. or 0.025 mm)0.01 to 0.03, incl 1.5Over 0.03 to 0.05, incl 1.0Over 0.05 to 0.10, incl 0.8B837 01 (2009)313. Sampling13.1 The lot size, portion size, and selection of pieces shal
47、lbe as follows:13.1.1 Lot size shall be 5000 lb (2275 kg) or fractionthereof.13.1.2 Sample pieces shall be selected according to thefollowing schedule:Number of Piecesin the LotNumber of Piecesto be Selected1to50 151 to 200 2201 to 1500 3Over 1500 0.2 % of total number piecesbut not to exceed 1013.1
48、.3 Coiled TubeA length sufficient for all necessarytests shall be cut from each coil. The remaining portion of thesecoils shall be identified and included in the shipment. Thepermissible variation in lengths of such coils shall be waived.13.2 Sampling for Chemical Analysis:13.2.1 The sample shall be
49、 taken in approximately equalweight from each portion piece selected in 13.1.2 and inaccordance with Practice E255. The minimum weight of thecomposite sample shall be 150 g.13.2.2 Instead of sampling in accordance with PracticeE255, the manufacturer shall have the option of sampling at thetime castings are poured or from the semi-finished product.13.2.3 The number of samples taken during the course ofmanufacture shall be as follows:13.2.3.1 When samples are taken at the time the castings arepoured, at least one sample shall be taken for
